I'm sure you've heard of Tone It Up, but in case you haven't, here's what you've been missing. The girls from Tone It Up, Karena and Katrina are such a great motivation to us regular peeps. If you're not a fitness queen, don't have die hard abs, or just like doing a quick workout, they have some great tips for you. Of course they're gorgeous too, which helps a bit. Warning: after you view these photos, you will definitely want to get your butt off the couch. Enjoy!